New partial photoneutron reaction cross sections for 90Zr in the region of GDR

Varlamov, V.V.; Davydov, A.I.; Peskov, N.N.

Авторы: Varlamov V.V., Davydov A.I., Peskov N.N.
Сборник: Международная конференция «Ядро-2017» (67-е Совещание по ядерной спектроскопии и структуре атомного ядра), 12-15 сентября 2017 г., Алматы, Республика Казахстан. Тезисы
Тезисы
Год издания: 2017
Место издания: РГП «Институт ядерной физики» Алматы, Республика Казахстан
Первая страница: 29
Последняя страница: 29
Аннотация: The experimental data for partial reactions (g, 1n) and (g, 2n) cross sections on isotope 90Zr were analyzed. It was obtained that data obtained in both experiments (Livermore and Saclay) do not satisfy objective physical data reliability criteria: – ratios Fexpi = SIGMAexp(g, 1n)/SIGMAexp(g ,xn) obtained for data from both experiments [6, 7] noticeably differ from Ftheori = SIGMAtheor(g, 1n)/SIGMAtheor(g ,xn) calculated in the combined model of photonuclear reactions; – in the energy range from ~ 24.5 MeV up to ~ 27 MeV there are forbidden negative values in Fexp1 and correspondingly values Fexp2 > 0.50. New data free of the uncertainties mentioned above were evaluated for 90Zr using the experimental-theoretical method [1]. The only experimental reaction cross section SIGMAexp(g, xn) free from problems of experimental determination of neutron multiplicity was used and shared into the partial parts using the equations Ftheori = SIGMAtheor(g, 1n)/SIGMAtheor(g ,xn) of the combined model. The way of new cross sections evaluation was the following – SIGMAeval(g, in) = Ftheori • SIGMAexp(g, xn). It means that competition between partial reactions is in accordance with model and their sum SIGMAeval(g, xn) is equal to SIGMAexp(g, xn) also free from problems mentioned. New cross sections were evaluated for (g, 1n) and (g, 2n) reactions. Using evaluated partial reactions cross sections new data were obtained also for total photoneutron reaction [(g, 1n) + (g, 2n) + (g, 3n) + …] ~ (g, abs). Similarly to the situation for isotopes 91,94Zr in the case of isotope 90Zr there are noticeable disagreements between the evaluated and experimental data also. Therefore many physical effects estimations based on using the experimental data for 90Zr(g, 1n) and 90Zr(g, 2n) reactions cross sections should be reanalyzed.
Добавил в систему: Варламов Владимир Васильевич

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ЦЭМИ РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ЦЭМИ РАН

New partial photoneutron reaction cross sections for 90Zr in the region of GDRтезисы доклада

Прикрепленные файлы